Development of high performance PLA based nanocomposites

高性能PLA基纳米复合材料的开发

• 批准号: RGPIN-2019-04566
• 负责人: Carreau, Pierre
• 金额: $ 2.84万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753728
• 关键词: Development; performance; PLA; based; nanocomposites

The main objective of this research program is to develop biopolymer blends based on Polylactide (PLA) with outstanding properties to replace synthetic polymer blends for engineering and possibly biomedical applications. We will examine the properties of a few promising PLA-based blends made with a bio-based polyamide (PA11) or polycaprolactone (PCL), or with biodegradable poly(butylene succinate adipate), PBSA, and poly(butylene adipate terephthalate), PBAT. In parallel, the addition of nanoparticles to promising blends will be investigated to control and stabilize their morphology and improve their final properties. Potential nanoparticles are cellulose nanocrystals (CNCs), nanoclay (montmorillonite, sepiolite, halloysite nanotubes), carbon nanotubes and graphene. The Hansen solubility parameter differences between various two components of the potential nanocomposites and polymer components will be determined and correlated with the apparent yield stress determined from rheology. These results will be used to make selections of components of most promising nanocomposites. Selective localization of the nanoparticles in the blends will be sought, in particular at the interface of both polymer components. These blends and nanocomposites will be prepared in the molten state via an internal mixer or in solution-cast methods to improve the dispersion of the nanoparticles. Possibly a compatibilizer will be used to reduce the interfacial tension between the polymer components and improve the dispersion of the nanoparticles. Rheometry in shear and elongational flows will be used to verify the stability of the blend and nanocomposite morphology and assess the efficiency of the nanoparticles with or without plasticizers in controlling droplet coalescence. Basic thermo-mechanical, tensile and impact properties of the blend nanocomposites will be determined and compared to those of polypropylene. Eventually, for selected nanocomposites, electrical or barrier properties as well as foamability would be evaluated. Fundamental and original knowledge will be gained on the use of nanoparticles and the effect of their nature and geometry on the control and stabilization of the morphology of blends. The major impact of this work will be to provide key formulations for novel PLA blend nanocomposites with outstanding properties for applications in the automotive and electronic sectors as well as in biomedical fields, sectors of major importance for Canada.

该研究计划的主要目的是开发基于多乳酸（PLA）具有出色特性的生物聚合物混合物，以取代用于工程和可能的生物医学应用的合成聚合物混合物。我们将研究与生物基聚酰胺（PA11）或聚二苯二甲酮（PCL）或可生物降解的聚（丁基琥珀酸酯脂肪），PBSA和聚（丁烷依代依然脂肪酸脂肪三苯二甲酸酯）制成的一些有前途的基于PLA的混合物的性能。同时，将研究将纳米颗粒添加到有希望的混合物中，以控制和稳定其形态并改善其最终特性。潜在的纳米颗粒是纤维素纳米晶体（CNC），纳米粘土（Montmorillonite，Sepiolite，Haloysite纳米管），碳纳米管和石墨烯。汉森溶解度参数的参数差异将确定潜在纳米复合材料和聚合物成分的两个成分之间，并与流变学确定的明显屈服应力相关。这些结果将用于选择最有前途的纳米复合材料的组件。将寻求混合物中纳米颗粒的选择性定位，特别是在两个聚合物组件的界面上。这些混合物和纳米复合材料将通过内部混合器或溶液铸造方法在熔融状态中制备，以改善纳米颗粒的分散体。可能会使用兼容剂来减少聚合物成分之间的界面张力并改善纳米颗粒的分散体。剪切和伸长流中的流变学将用于验证混合和纳米复合形态的稳定性，并评估具有或没有增塑剂控制液滴合并的纳米颗粒的效率。将确定混合纳米复合材料的基本热机械，拉伸和冲击性能，并将其与聚丙烯的基本热力学特性进行比较。最终，将评估选定的纳米复合材料，电或屏障特性以及泡沫性。 基本知识和原始知识将获得使用纳米颗粒的使用以及其性质和几何形状对混合形态的控制和稳定的影响。这项工作的主要影响是为新型PLA混合纳米复合材料提供关键配方，具有出色的特性，用于在汽车和电子部门以及生物医学领域的应用，这是对加拿大最重要的行业。